Abstract This paper describes and discusses the preprocessing calibration of magnetic data taken by navigational magnetometers onboard two GRACE satellites, with focus on almost 10 years period from January 2008 to end mission in October 2017 for which 1-Hz are available. A is performed comparing raw magnetometer sensor readings model vector values as provided CHAOS-7 geomagnetic field time pos...

In ring theory, duoness and Zhou radical which is known as delta ideal have important roles. this paper, we consider both concepts together by studying on radical. By means of study, obtain a new kind generalizations commutativity. Firstly, determine some rings, then applied to the duo property so introduce notion right (left) dZr rings. We show that not left-right symmetric. investigate relati...

‎In this paper we give an upper bound for Noetherian dimension of all injective modules with Krull dimension on arbitrary rings‎. ‎In particular‎, ‎we also give an upper bound for Noetherian dimension of all Artinian modules on Noetherian duo rings.

Jiayi Wang, Duo Fu & Jiaxi Xu* State Key Laboratory of Chemical Resource Engineering, Department Organic Chemistry, College Beijing University Technology, Beijing, People’s Republic China